DEPOSITS (Deposit Liabilities) (Details) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
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| Deposits: | ||
| Non-interest-bearing accounts | $ 4,542,942 | $ 4,489,839 |
| Interest-bearing checking | 2,623,149 | 2,609,080 |
| Regular savings accounts | 3,853,612 | 3,723,922 |
| Money market accounts | 1,296,869 | 1,388,001 |
| Total interest-bearing transaction and savings accounts | 7,773,630 | 7,721,003 |
| Certificates of Deposit Greater Than or Equal to $250,000 | 516,042 | 528,102 |
| Certificates of Deposit Less Than $250,000 | 956,979 | 1,004,202 |
| Total certificates of deposit | 1,473,021 | 1,532,304 |
| Total deposits | 13,789,593 | 13,743,146 |
| Included in total deposits: | ||
| Public fund transaction and savings accounts | 413,173 | 373,529 |
| Public fund interest-bearing certificates | 34,794 | 34,431 |
| Total public deposits | 447,967 | 407,960 |
| Total brokered certificates of deposit | $ 0 | $ 50,002 |
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- Definition Certificates of Deposit Greater Than or Equal to $250,000 No definition available.
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- Definition Certificates of Deposit Less Than $250,000 No definition available.
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- Definition Deposits, Domestic, Public Deposits No definition available.
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- Definition Deposits, Domestic, Public Fund Transaction No definition available.
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- Definition Deposits, Domestic, Transaction and Saving Accounts No definition available.
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- Definition Included in total deposits: [Abstract] No definition available.
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- Definition Interest-bearing Domestic Deposit, Public Fund Certificates No definition available.
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- References No definition available.
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- Definition The aggregate of all domestic interest-bearing and noninterest-bearing deposit liabilities. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of interest-bearing domestic third-party deposits placed by or through the assistance of a deposit broker, also known as brokered deposit liabilities. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of interest-bearing domestic certificate of deposit liabilities. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of interest-bearing domestic checking deposit liabilities. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of interest-bearing domestic money market demand account deposit liabilities. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of interest-bearing domestic savings deposit liabilities. Saving deposits bear interest and have no stated maturity. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of domestic noninterest-bearing deposits held by the entity, which may include demand deposits, checking, brokered and retail deposits. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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